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Biofilm formation is important in periodontitis pathogenesis. Porphyromonas gingivalis and Candida albicans, which are found in dental plaque and can form a biofilm, have virulence factor that facilitates the bacterial colonisation and proliferation in periodontal pockets. Chitosan extract of flower crab (Portunus pelagicus) has antimicrobial potential which can be used as an alternative therapy. The objective of this research was to analyse the potential of flower crab (Portunus pelagicus) chitosan in the inhibition of Porphyromonas gingivalis and Candida albicans biofilms. Methods: This research was a pure experimental laboratory. This study used flower crab (Portunus pelagicus) chitosan to inhibit the biofilm formation of Porphyromonas gingivalis and Candida albicans. The subjects were divided into four groups, where each group consisted of 4 samples. The K+ (positive control group), P1 (0.25% chitosan), P2 (0.5% chitosan), and P3 (1% chitosan). The biofilm inhibition was determined using the microtiter plate methods, which results in the value of optical density, then calculated using the inhibition formula percentage. Data analysis was conducted using the one-way ANOVA followed by the LSD test. Results: There were significant differences in the Porphyromonas gingivalis biofilm inhibition between groups (p<0.05), except in group K+ with P3. Whereas for Candida albicans biofilm inhibition showed no significant difference (p < 0.05) between group K+ with P2 and P3; group P1 with P2 and P3; and group P2 with P3. Conclusion: The chitosan of flower crab (Portunus pelagicus) has the potential in inhibiting the biofilm formation of Porphyromonas gingivalis and Candida albicans. The highest antibacterial effect on the biofilm formation is shown in the concentration of 1%.

padjadjaran journal of dental researchers and students

&lt;p&gt;Potensi kitosan kepiting rajungan (Portunus pelagicus) dalam penghambatan pembentukan biofilm Porphyromonas gingivalis dan pertumbuhan Candida albicans&lt;/p&gt;&lt;p&gt;Potential of flower crab (Portunus pelagicus) chitosan in the inhibition of Porphyromonas gingivalis and Candida albicans biofilm&lt;/p&gt;